Bonide Captain Jack's Deadweed Brew, 32 oz Concentrate, Controls All Types of Weeds and Grasses, For Organic Gardening

Here in So Cal, weeds follow rain like clockwork. And since there was an untended lot across the street from me, I have about 15 years of weed seed accumulated in the soil. In addition, I'm trying to install a drought-tolerant native landscape, which requires that I clear the front yard first. Digging out weeds and grasses turned out to be a never-ending task. I have tried many different options, including hand weeding, various "organic" weed killer, flame torch, and glyphosate and decided to try this one. First, it is not OMRI (organic gardening) certified. But being a chemist, I researched the online Safety Data Sheet and found that it is mostly C8 and C10 saturated organic acids, which can be derived from coconut oil, with 20% "other" (nonlisted, therefore presumably non-hazardous surfactant). According to what I can find, the active ingredients are non-cancerous, not persistent, and do not bio-accumulate. That's a plus. Taking a cue from other reviews, I mixed it at the higher concentration and sprayed it on a variety of emerging and established weeds and grasses. First of all, it works really well on most newly-emergent weeds and grasses, including spurge, foxtail, and oxalis. It coats leaves evenly and - unlike glyphosate- "burns" them quickly, so I can see in two days where I missed, and re-spray where necessary. It does NOT work on established grasses, even tho I saturated some clumps thoroughly, and does NOT work on common mallow. Because it only works on leaves, and not seeds, it must be re-applied on each new crop of sprouting weed and grass seeds. But because of the nature of this weed killer, I feel more comfortable re-spraying, and with each application there are fewer and fewer sprouts to contend with. Overall, this spray will make clearing the yard much easier, and reduce the amount of hand-digging by about 70%. It IS pricey, but because of the combination of positive qualities and the amount of work it will save, I feel it's worth the cost.

Does a good job of killing weeds. Shipping time long compared to delivery of other Amazon purchases. But product works well if you have the time to wait for delivery.

definitely burns the visible grass, but doesnt necessarily kill the root, so it will start to grow back.

Very effective one shot killer on most weeds such as various types of oxalis and Black medic. Had to spray the Campanula rapunculoides (in my area we call it cancer of the garden) and twice on the weedy grasses. I've even bumped off the ever intrusive Bishop's weed (Aegopodium p. 'Variegatum') coming from my neighbor's yard with two rounds. 2-4D didn't make a dent in most weeds. Captain Jack's to the rescue!

Kills weeds and moss quickly

Doesn’t work. Mixed per instructions, tried doubling, then tripling the amount of concentrate per gallon of water and still doesn't kill weeds or grass.

It works, it's easy to use and the concentrate is a better value. I bought one of the ready to use spray bottles and one concentrate to make refills so that it would always be properly labeled. It works as well as any herbicide but is safer than many.

This is the first time I’ve used this specific product from this company. I’ve used other stuff, but I was blown away. I noticed the weeds were already wilting within a couple hours! By next morning they were well on their way to being dust in the wind. The only thing is that it does leave a little white residue on your concrete. It rinses off with some rain, or you could probably use a hose. However it’s not terribly noticeable unless you have dark pavers or asphalt.